1. a logarithmic unit of sound intensity; 10 times the logarithm of the ratio of the sound intensity to some reference intensity; [syn: decibel, dB]
WordNet (r) 3.0 (2006):
decibel
n 1: a logarithmic unit of sound intensity; 10 times the
logarithm of the ratio of the sound intensity to some
reference intensity [syn: decibel, dB]